Skip to main content
Astronomy

You are not logged in. Your edit will be placed in a queue until it is peer reviewed.

We welcome edits that make the post easier to understand and more valuable for readers. Because community members review edits, please try to make the post substantially better than how you found it, for example, by fixing grammar or adding additional resources and hyperlinks.

4
  • $\begingroup$ That fringe algorithm is even trickier when your telescopes are in orbit, with clocks that are experiencing changing time dilation due to variations in velocity & gravity. I guess it's similar to the problem of synching GPS clocks, but GPS sats aren't trying to log interferometry data. ;) $\endgroup$
    – PM 2Ring
    Commented Jun 29, 2022 at 20:33
  • $\begingroup$ @PM2Ring actually satellites that use radar or lasers to map planets surfaces and gravity fields to unbelievable precision have to do it too. The reason I keep emphasizing heterodyning and recording is to point out that all of those corrections can be implemented or at least refined years later during data analysis in a self-consistent way. While tricky for newcomers, the algorithms for implementing GR corrections for constellations of spacecraft are a half-century old. $\endgroup$
    – uhoh
    Commented Jun 29, 2022 at 21:22
  • $\begingroup$ @PM2Ring see Earth’s gravity from space and GRAIL and GRACE and GRACE-FO and Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) $\endgroup$
    – uhoh
    Commented Jun 29, 2022 at 21:24
  • $\begingroup$ Let us continue this discussion in chat. $\endgroup$
    – PM 2Ring
    Commented Jun 29, 2022 at 22:44